JP6635534B1 - Thermal insulation structure of wooden framed house - Google Patents

Abstract

An object of the present invention is to provide a thermal insulation structure having excellent thermal insulation performance in which a UA value representing an outer performance of cooling and heating is 0.3 W / m2K or less by appropriately performing thermal insulation of each part in a wooden framed house. thing. A thermal insulation structure of a wooden house constructed using a wooden frame construction method is constructed by laying a fiber-based heat insulating material at a predetermined thickness along a back surface of a ceiling material on a back of a hut. A ceiling-filled heat-insulating section 60, a wall-covered heat-insulating section 40 formed by sticking a plastic-based heat-insulating material along the outer surface of the frame of the outer wall section 4, and a plastic-based heat-insulating section provided along the back surface of the floor section 3 by a predetermined amount. And a floor-filling heat-insulating section 30 laid out with a thickness. Unlike a house with completely external insulation that adopts roof insulation and basic insulation, the cooling and heating volume does not include the space behind the hut or under the floor, so the cooling and heating capacity can be reduced and the cooling and heating efficiency can be increased. . [Selection diagram] Fig. 1

Description

  The present invention relates to a thermal insulation structure of a wooden house constructed by a wooden frame construction method (conventional construction method) for supporting a load by a wooden frame composed of structural materials such as columns and beams.

  Various construction methods have been proposed as insulation and heat insulation methods for wooden framed houses. For example, filling insulation method to fill insulation material between structural materials at each part of roof, ceiling, outer wall and floor, wall insulation method to attach insulation material to outside of outer wall, filling insulation method to wall insulation method An additional heat insulation method to which a method is added is known. For example, Patent Literature 1 describes a configuration in which ceiling filling insulation, outer wall filling insulation, and floor filling insulation are performed in a conventional wooden construction house.

  In any of these methods, it is necessary to ensure airtightness on the floor, wall, ceiling, etc., to enhance the heat insulating effect of the heat insulating material, and to prevent the occurrence of dew condensation on these parts. In particular, in a wooden house constructed by a wooden frame construction method, which is a conventional construction method, a gap is formed between a portion where a floor and a wall are joined and a portion where a wall and a ceiling are joined. In the past, air gaps were provided in such gaps to prevent the generation of airflow inside the wall that passes from under the floor to the inside of the wall through the wall, thereby securing the heat insulation performance of the heat insulating material and preventing internal condensation. are doing. For example, Patent Literature 1 describes that airflow is stopped by applying a foamed plastic having heat insulating properties to a connection portion of each portion by an in-situ foaming method. Patent Document 2 proposes an airflow blocking member having a simple configuration and easy to be used for a wooden framed house.

JP-A-62-206139 JP 2015-206247 A

As described above, in a wooden framed construction house, various heat insulation construction methods have been proposed for use in each part such as a roof, a ceiling, a wall, and a floor. However, in order to ensure that the UA value (outer skin average heat transfer coefficient) representing the outer performance of cooling and heating as ZEH (zero energy house) is 0.3 W / m ² K or less, as a heat insulating structure of a wooden framed house, No comprehensive study has been made on how to insulate each part. In order to obtain a wooden framed house with high heat insulation performance, it is important to increase the filling amount of the heat insulating material and reduce the cooling / heating capacity.

  Also, in the heat insulation structure of a wooden framed house, airflow prevention for ensuring heat insulation performance is also an important factor. However, the number of members and the number of construction steps are increased due to the airflow suppression, and there is a disadvantage that the number of construction errors increases accordingly. It is desired that the airflow can be stopped without obstructing the workability and without forgetting the work.

  In addition, there is a concern about achieving high insulation. When the outer skin performance of the building is high, the cooling load increases accordingly. In order to increase the heat insulation of a wooden framed house, it is necessary to enhance its heat shielding performance to prevent heat trapping.

In view of the above, an object of the present invention is to provide an excellent heat insulation performance with a UA value of 0.3 W / m ² K or less by appropriately performing heat insulation of each part in a wooden framed house. An object of the present invention is to provide a heat-insulating structure.

  Further, an object of the present invention is to provide a heat-insulating and heat-insulating structure capable of preventing airflow in a wooden framed house using an airflow prevention member for preventing occurrence of airflow in a wall without using a dedicated airflow prevention member. It is in.

  It is a further object of the present invention to provide a heat-insulating and heat-insulating structure in a wooden framed house, which is capable of effectively suppressing heat clogging in walls and in the back of a shed in order to enhance heat-insulating performance.

The thermal insulation structure of the wooden framed house of the present invention
In the ceiling portion, a ceiling-filled insulation section filled with a ceiling-filled insulation material made of a fiber-based insulation material along the back surface of the ceiling material,
In the outer wall portion, a wall outer heat insulating portion in which an outer heat insulating material made of a plastic-based heat insulating material is attached along an outer surface of a wall frame forming the outer wall portion,
In the floor portion, a floor-filled heat-insulating portion made of a plastic-based heat-insulating material is provided along the back surface of the floor material.

  The heat-insulating and heat-insulating structure of the present invention differs from the case of a completely externally insulated house adopting roof insulation and basic insulation, in that the cooling and heating volume does not include the space behind the hut or under the floor. Therefore, the cooling and heating capacity can be reduced and the cooling and heating efficiency can be increased as compared with the case where complete external heat insulation is employed. In addition, by using a plastic heat insulating material for outer wall heat insulation and floor heat insulation, sufficient air tightness can be secured in the outer wall portion and the floor portion, and adverse effects such as corrosion of structural materials due to dew condensation can be suppressed.

  In the present invention, the transverse members as structural members located at the upper end of the outer wall portion and the upper end of the partition wall portion in the room are arranged such that their lower ends are located below the lower end of the ceiling material, Is preferably a joist ceiling attached so that the fore edge comes into contact with the side surface of the horizontal member. Unlike a suspended ceiling or the like, it is easy to fill a ceiling filling heat insulating material without gaps on the back surface of the ceiling material. In addition, the joint between the side surface of the horizontal member and the fore-edge of the ceiling material functions as an airflow stop that blocks the flow of air that rises behind the shed. The airflow blocking work required when using the ceiling filling insulation method is not required, and the workability is improved.

  In this case, it is desirable to set the composition of the horizontal member (the height of the cross section of the horizontal member) according to the required thickness of the ceiling-filled heat-insulating material constituting the ceiling-filled heat-insulating portion. A space that can be filled with a ceiling-filling heat-insulating material required to exhibit the required heat-insulating performance can be secured above the ceiling.

  In addition, it is desirable that the ceiling-filled heat-insulating section is provided with an airtight sheet spread between the ceiling material and the fibrous heat-insulating material along the back surface of the ceiling material. Thus, the ceiling surface can be reliably maintained in an airtight state, and the flow of air that rises from the inside of the wall or from the indoor side to the back of the cabin can be reliably blocked, and the cooling and heating performance can be maintained.

  Similarly, the first-floor floor portion is composed of a base and a large-scale flooring arranged so that an upper end thereof is located on the same plane, and a floor material spread over the upper ends of the base and the large-scale flooring (based on a rigid floor method). In addition, it is desirable that the joining portion between the upper end of the large drawer and the flooring material be a portion that functions as an airflow stop that blocks the flow of air rising from the underfloor space. The airflow blocking work required when the floor filling insulation method is adopted is not required, and the workability is improved.

  In this case, it is desirable that the foundation and the formation of the pulling be set in accordance with the required thickness dimension of the floor filling heat insulating material constituting the floor filling heat insulating part. A space that can be filled with the floor-filling heat-insulating material required for exhibiting the required heat-insulating performance can be secured in the floor.

  Next, in order to enhance the heat shielding performance of the roof portion, it is desirable that the roof portion be provided with a heat shielding material made of aluminum or the like attached along the rafters so as to be parallel to the roof material. As a result, a double ventilation heat shield structure is formed in the roof portion, and it is possible to prevent the occurrence of hot staking in the attic or the like. That is, heat from the outside to the inside is blocked by the heat shield. In addition, between the roof material and the heat shield, the roof side where natural ventilation is formed from below the eaves of the roof part, through the space between the roof material and the heat shield, and to the outside from the ridge side of the roof part It becomes a ventilation layer. At the same time, natural ventilation is formed between the heat shield and the ceiling-filled heat-insulating part, from below the eaves, through the space behind the cabin surrounded by the heat-shielding material and the ceiling-filled heat-insulating part, and then to the outside from the ridge side. Becomes a hut back ventilation layer. These double ventilation layers function as heat shielding layers, and natural ventilation formed therethrough can suppress a rise in the temperature at the back of the cabin. Since the amount of heat stored in the ceiling-filled heat insulating material can be reduced, the cooling performance can be improved by preventing heat behind the cabin in summer.

  Similarly, in order to prevent heat clogging in the outer wall portion, it is preferable that the wall outer heat insulating portion includes a laminated heat insulating material such as an aluminum sheet laminated on the outer surface of the outer heat insulating material. In this case, between the exterior material of the outer wall portion and the laminated thermal barrier, from the gap on the lower end side of the outer wall portion, passes between the exterior material and the laminated thermal barrier, and passes through the gap on the upper end side of the outer wall portion. It is desirable to provide an outer wall ventilation layer in which natural ventilation that escapes from the outside is formed. This makes it possible to reduce the heat capacity accumulated in the wall-outer heat insulating material, to suppress a rise in the indoor temperature particularly in summer, and to reduce energy consumption for cooling and heating.

  Next, in the present invention, a heat shield sheet such as an aluminum sheet is installed on the back of the hut so as to be parallel to the roof surface along the lower surface of the rafter to form a double ventilation layer for ventilation of the hut. I have. The double ventilation layer passes between the roof material and the aluminum heat shield through the gap under the eaves, and passes through the gap on the ridge side to the outside, and the aluminum shielding from the gap under the eaves. An airflow layer at the back of the hut that passes through the hut back surrounded by the heat material and the heat-insulating portion filled with the ceiling and passes through the gap on the ridge side to the outside. By forming a double ventilation layer on the roof portion, the heat capacity accumulated in the ceiling-filled heat insulating material can be reduced, and in particular, a rise in indoor temperature in summer can be suppressed, and energy consumption for cooling and heating can be reduced.

  Similarly, a heat shield sheet such as an aluminum sheet is stuck on the outer surface of the outer heat insulating material, and the gap between the lower end side of the outer wall and the space between the outer material of the outer wall and the heat shield sheet passes through the gap under the eaves of the outer wall. To form an outer wall ventilation layer that escapes from the outside. For example, in the heat insulating portion of the wall lining, a heat insulating sheet provided with a heat shielding sheet is used. As a result, the heat capacity accumulated in the wall-extended heat insulating portion can be reduced, and in particular, the rise in indoor temperature in summer can be suppressed, and energy consumption for cooling and heating can be reduced.

(A) is a conceptual diagram showing a thermal insulation structure of a wooden house according to an embodiment to which the present invention is applied, (b) is a partially enlarged view thereof, and (c) is a wooden house and an outer heat-insulating house according to the present invention. It is explanatory drawing which shows the air-conditioning capacity of. It is a quadrangle figure of the outer wall part of the wooden house of FIG.

  An embodiment of a thermal insulation structure of a wooden framed house to which the present invention is applied will be described below with reference to the drawings. Note that the embodiment described below shows an example of the present invention, and the present invention is not limited to the configuration of the embodiment.

(overall structure)
First, with reference to FIG. 1A, the overall configuration of a thermal insulation structure of a wooden framed house according to the present embodiment will be described. As is well known, a wooden framed house 1 (hereinafter, simply referred to as a "wooden house 1") includes a reinforced concrete solid base or a cloth base, a base part 2, a floor part 3 (first floor), It is composed of each part such as an outer wall part 4, a partition wall part 5, a ceiling part 6, a roof part 7, and the like.

  The thermal insulation structure of the wooden house 1 has a floor filling structure in which a floor filling heat insulating material 32 made of a plastic heat insulating material is filled (paved) along the back surface of the floor material 31 (floor plywood) of the floor portion 3. A heat insulating portion 30, a wall heat insulating portion 40 composed of a heat insulating material 42 made of a plastic heat insulating material adhered along the outer surface of the frame of the outer wall portion 4, and a ceiling material (ceiling base material) in the ceiling portion 6. ) 61 along the back surface of the ceiling-filled heat-insulating material 62 (fiber-based heat-insulating material) at a predetermined thickness.

  The living space in the wooden house 1 that requires cooling and heating is surrounded by the floor-filled heat-insulating section 30, the wall-extended heat-insulating section 40, and the ceiling-filled heat-insulating section 60. On the other hand, for example, in the case of a general outside heat insulation house 100 shown in FIG. 1C, the heat insulation structure employs a base heat insulation portion 130, a wall outer heat insulation portion 140, and a roof heat insulation portion 170. ing. The thermal insulation method of the wooden house 1 of this example has the following advantages as compared with the case where the complete external thermal insulation method is employed.

  First, when adopting the basic heat insulation, it is necessary to maintain the heat insulation performance by always cooling and heating the base portion under the floor and utilizing the heat capacity of the basic concrete. For this reason, even when the resident is absent, the cooling and heating energy is consumed, and the cooling and heating load is increased, resulting in a problem that the consumed energy is increased as compared with the floor filling and heat insulation method. In this example, by adopting the filling and heat insulating method for the floor portion, the volume of the base portion can be reduced from the cooling and heating volume, so that the cooling and heating load can be reduced and the stabilization of the room temperature by the cooling and heating device can be quickly realized.

  In the case of adopting the roof insulation, a heat insulating material is installed directly under the roof, so that the roof is heated to an outside temperature or higher in summer and the heat is stored in the roof heat insulating material. This is one of the major reasons for increasing the cooling / heating load. In this example, by adopting the ceiling-filled insulation method, the volume of the space behind the roof between the roof portion 7 and the ceiling-filled heat insulating material 62 can be reduced from the cooling and heating capacity, so that the cooling and heating load can be reduced accordingly. In addition, in the space behind the cabin, natural ventilation is performed, and the internal temperature becomes close to the outside air temperature, the amount of heat stored in the ceiling-filled heat insulating material can be reduced, and the cooling load can also be reduced.

  As described above, the cooling and heating volume V (100) in the externally insulated house includes the space 171 and the underfloor 131 in addition to the living space 100A. Compared with the case where such complete external heat insulation is employed, in the wooden house 1 of this example, the volume under the hut and under the floor is not included in the cooling and heating volume, and the living space 1A becomes the cooling and heating volume V (1). The cooling / heating volume V (1) is reduced by about 20% compared to the cooling / heating volume V (100) in the case of complete external heat insulation, and the cooling / heating efficiency can be increased.

  In addition, when using the filling insulation method as the insulation method for the outer wall, there are problems that the airflow prevention work is required and that the amount of the insulation material is limited by the thickness of the wall, so a sufficient amount of the filler material May not be able to be placed. In order to secure the filling amount of the heat insulating material, it is conceivable to employ an additional heat insulating method. However, in this case, there is a high risk of dew condensation in the wall and a problem of corrosion of the structural material occurs. In this example, a wall-lined thermal insulation method is employed as the thermal insulation method for the outer wall portion 4, and a plastic-based thermal insulation material having high thermal insulation performance is used as the thermal insulation material 42. This eliminates the need for airflow blocking work, and also allows the outer wall portion 4 to have sufficient heat insulating performance.

(Thermal protection structure)
Next, in the present example, the heat trapping prevention structure is adopted for the outer wall portion 4 and the roof portion 7 as follows. Referring to FIGS. 1A and 1B, in the outer heat insulating portion 40 of the outer wall portion 4, a heat insulating sheet 43 such as an aluminum sheet is provided on the outdoor surface as an outer heat insulating material 42. Uses laminated thermal insulation. Further, between the outer heat insulating material 42 and the outer material 44 of the outer wall portion 4, there are provided outer wall ventilation layers 45 at regular intervals that pass from the lower end gap to the upper end gap. The width of the outer wall ventilation layer 45 is increased to, for example, 30 mm. The natural ventilation formed through the outer wall ventilation layer 45 and the heat shielding effect of the heat shielding sheet 43 effectively prevent the inside of the outer wall portion 4 from being stowed.

  On the other hand, in the roof portion 7, a heat shielding structure composed of a double ventilation layer is employed to prevent heat trapping. Describing with reference to FIG. 1A, a heat shield sheet 73 made of an aluminum sheet or the like is adhered along the lower surface of the rafter 72 of the roof portion 7 on the back of the hut 71. A roof side ventilation layer 75 is formed between the roof material 74 and the heat shield sheet 73 so as to pass from the eaves below to the ridge. The cabin back 71 covered by the heat shield sheet 73 functions as a cabin back side ventilation layer 76 that passes from below the eaves to the ridge. The heat shielding effect of the heat shielding sheet 73 and the double ventilation layer composed of the roof side ventilation layer 75 and the hut back side ventilation layer 76 effectively prevent the back of the hut 71 from being stowed.

(Airflow blocking structure)
Next, referring to FIG. 2, a description will be given of an airflow stop required when the filling and heat insulating method is employed. In the wooden house 1 of the present example, the required airflow stop is configured as follows. First, the floor filling and heat insulating unit 30 will be described. In general, in the case of a floor-filled insulation method, the amount (thickness) of the heat-insulating material is limited by the height of the base and the scale. If a larger amount (thickness) of heat insulating material is to be placed to achieve high heat insulation, it is necessary to install joists to secure a space for filling the heat insulating material. It is necessary to work to stop the air flow in the gap formed between the base and the base.

  The floor portion 3 of the present example includes a base 21 installed at the upper end of the rising portion of the base portion 2 and a large pulley 34 spanned between the bases 21 and supported by a floor bundle 33 such as a steel bundle. A rigid floor (floor-less floor) having a structure in which a floor material 31 (floor plywood) is laid with these upper ends flush and a floor finishing material 35 is laid thereon. As the base 21 and the pulling bar 34, a bar material larger than usual, for example, a bar material (back) of 210 mm is used. On the back floor, a space between the base 21 and the large drawer 34 is filled with phenol foam at a thickness of 200 mm to form a floor-filled heat insulating material 32.

  As described above, the base 21 and the large-scale 34 are used by using square bars that are higher in quality than general 120 × 120 and 90 × 90 squares used as the base 21 and the large-scale The flooring material 31 is directly attached on the floor. A space that can be filled with the floor-filling heat-insulating material 32 with a sufficient thickness can be secured between the high-quality base 21 and the large-scale lift 34, and the heat-insulating performance of the floor-filling heat-insulating section 30 can be secured.

  In addition, the floor material 31 is directly joined to the upper ends of the base 21 and the large pulling bar 34. For this reason, no gap is formed between the joint A between the floor 3 and the outer wall portion 4 and the joint B between the floor 3 and the partition wall portion 5. Therefore, the rising air flow can be shut off from under the floor through the gaps formed in these joints A and B. In the conventional construction method, there is a gap between the connecting portions A and B, so airflow-stopping work for attaching a member for airflow-stopping was necessary. Eliminating the need for airflow prevention work improves workability. In addition, it is possible to prevent the deterioration of the heat insulation performance and the occurrence of dew condensation in the wall due to the formation of the airflow in the wall due to the forgetting of the airflow blocking work, the construction error or the like.

  Next, the airflow stopping structure in the outer wall portion 4 will be described. As is well known, the outer wall portion 4 provided with the wall lining heat insulating portion 40 is a shaft composed of a column 46 erected on the base 21, a beam connecting the upper ends of the columns 46, and a horizontal member 47 such as a girder. Has a pair. A wall material 48 (a wall interior base material such as a gypsum board or a plywood, or a wall finishing material such as a siding board or a decorative board) is adhered to the indoor side surface of the frame. An outer wall heat insulating portion 40 composed of an outer heat insulating material 42 is disposed on an outer surface of the frame, and an outer wall exterior material 44 is attached to the outer surface thereof via an outer wall ventilation layer 45. Have been.

  In the wall outer insulation unit 40 of this example, a rigid urethane foam 90 mm thick with a heat insulating sheet made of aluminum is used as the plastic outer insulation member 42. The lining heat insulating material 42 is supported by heat insulating receiving members 42 a and 42 b attached to the outer side surface of the base 21 and the outer side surface of the horizontal member 47 in the vertical direction. By installing the plastic heat insulating material on the outside of the pillar 46, an airtight layer is formed on the outside air side of the pillar 46, so that it is not necessary to stop airflow on the outer wall surface.

  Further, in the outer wall portion 4, a ventilation structure for preventing generation of airflow in the wall is formed by using a beam and a girder of the wooden frame construction method. In other words, in the case of the wooden frame construction method, which is a conventional construction method, airflow prevention work is performed using timber between pillars and studs for airflow prevention work, but the number of members, man-hours are many, and construction errors increase, Supervision is often difficult. In this example, a quadrilateral module is employed in which the horizontal members 47 (beams, girders) omit the airflow blocking work.

  As shown in FIG. 2, in this quadrangle module, a square member having a length of 210 mm is used as the horizontal member 47. Further, the lower end 47a of the horizontal member 47 is positioned lower than the lower end of the ceiling material 61 (the interior base material such as gypsum board or plywood or the finishing material such as a decorative board) of the ceiling portion 6. The frame is assembled. That is, the ceiling portion 6 is a joist ceiling, with the horizontal member 47, which is a high-quality structural material, as a peripheral edge, and a ceiling material 61 is stretched under the ceiling joist 64 bridged therebetween.

  The joist of the ceiling portion 6 is attached to the indoor side surface 47b of the horizontal member 47, and the end surface of the ceiling member 61 abuts on the side surface 47b in a surface contact state. The upper end of the wall member 48 of the outer wall portion 4 is also attached to the edge of the ceiling member 61 from below while being joined to the side surface 47b of the horizontal member 47. As a result, the joining portion C having no gap is formed.

  Similarly, the joint portion D between the partition wall portion 5 and the ceiling portion 6 has the same configuration. That is, the horizontal member 47 arranged along the upper end of the partition wall portion 5 is, for example, a square member having a width of 120 mm and a length of 210 mm. The lower end 47 a of the horizontal member 47 is bridged so as to be located below the ceiling member 61. Thereby, the edge of the ceiling member 61 abuts on both side surfaces 47b and 47c of the horizontal member 47. The small edge at the upper end of both wall materials of the partition wall portion 5 is in contact with the edge of the ceiling material 61 from below. As a result, a connection portion D having no gap is formed.

  In the related art, an airflow blocking member is generally mounted on a ceiling line with the labor of a carpenter. Separately attaching an air flow stop member requires quality problems and labor, and in some cases, very difficult work. In this example, the structure of the horizontal member 47, which is a structural material, is set to be large, and the middle position of the side surface 47b is set to be a ceiling line. As a result, there is no gap between the connecting portions C and D, so that there is no need to separately install an airflow blocking member.

  Here, in this example, the lower end 47a of the horizontal member 47 disposed on the outer wall portion 4 and the partition wall portion 5 is lower than the lower end height of the ceiling member 61, and the horizontal member disposed on other portions than these. (Not shown) is arranged according to the lower end height of the ceiling material 61. In this case, when the lower ends of the horizontal members are aligned, the cross-sectional loss of the member increases at the joint between the horizontal members and at the joint between the horizontal member and the column, and the strength decreases. Further, when connecting the horizontal members, if the other horizontal member is located above the upper end of one horizontal member, it becomes impossible to connect both members.

  In order to solve such a problem, in the present embodiment, the horizontal member 47 is attached to the column 46 by using a hardware method, thereby compensating for the sectional defect. Also, in order to solve the problem that the two members cannot be connected due to the difference in height between the horizontal members, the column is extended above the upper end of one of the horizontal members, and the other horizontal member is connected to the column. It is designed to be attached to the upper end extension of. The hardware method adopted in this example is a method in which the joints and joints of the wooden frame are replaced with joints such as jaw hooks and mortise pipes, and the bolts and the drift pins are used to bind them. For example, “Tech One (registered trademark)” (Tatsumi Corporation) can be used as such a hardware method (joining fitting).

  Next, the ceiling filling and heat insulating unit 60 will be described. The ceiling-filled heat-insulating part 60 is configured by filling a ceiling heat-insulating material made of rock wool with a thickness of 270 mm between the horizontal members 47 on the back side of the ceiling material 61. An airtight sheet 65 is laid along the ceiling material 61 between the ceiling material 61 and the ceiling filling heat insulating material 62. Thereby, the airtightness of the ceiling surface is ensured, and the flow of air flowing from the space in the wall or the indoor space to the back of the hut via the ceiling surface can be blocked.

  Conventionally, a heat insulating material formed to a uniform thickness is laid on the back of the ceiling where a ridge, a ridge receiver, a hanging tree, and a horizontal member constituting the ceiling base are arranged. Unit. In this case, it is difficult to install the heat insulating material so that no gap is formed between each member and the heat insulating material. In this example, as described above, the use of the joist ceiling eliminates the necessity of a ridge, a ridge holder, and a hanging tree, and allows the formed heat insulating material to be uniformly laid without gaps. In addition, an airtight structure can be surely constructed by the airtight sheets spread along the space above the ceiling.

(Effects)
Hereinafter, the operation and effect of the thermal insulation structure of the wooden house 1 of this example will be described. In this example, the cooling and heating capacity is reduced by the mixed insulation method of the ceiling filling insulation section 60, the wall covering insulation section 40, and the floor filling insulation section 30 as compared with the conventional covering insulation method that is considered to have high energy saving performance. This can further reduce energy consumption for cooling and heating.

  Conventionally, when ceiling-filled heat insulation is adopted, a work for attaching an airflow blocking material is required. According to this example, the joints C and D between the wall portion and the ceiling portion are constructed without gaps by the ceiling material 61 continuous with the horizontal member 47 and the airtight sheet 65 spread on the back surface of the ceiling material 61. it can. Therefore, it is possible to realize an airflow blocking structure that is excellent in workability and does not cause a construction error or the like.

  In the conventional floor filling insulation method, it is necessary to install a joist to secure the space to fill the insulation, and to install the airflow prevention material at the joint between the floor and the wall to fill the gap. is there. According to this example, a sufficient heat insulating material filling space can be secured by increasing the size of the base 21 and the enlarger 34 (increase the size). In addition, since the base 21 and the large-scale pull 34 are continuously joined to the floor material 31, the joint A between the floor portion 3 and the outer wall portion 4 and the joint B between the floor portion 3 and the partition wall portion 5 are connected to each other by a gap. Can be constructed without any. Therefore, it is possible to realize an airflow blocking structure that is excellent in workability and does not cause a construction error or the like.

  In this example, in the wall outer heat insulating portion 40, a heat insulating sheet with a heat shielding sheet is used as the outer heat insulating material 42, and the outer wall ventilation layer 45 is made wider than the conventional ventilation method. This makes it possible to reduce the heat capacity accumulated in the wall-outer heat insulating material 42, to suppress a rise in indoor temperature particularly in summer, and to reduce energy consumption for cooling and heating.

  In addition to this, a heat shield sheet 73 is also provided under the rafters 72 on the roof to form a double ventilation structure on the roof portion 7. This makes it possible to reduce the heat capacity accumulated in the ceiling-filled heat insulating material 62, to suppress a rise in indoor temperature particularly in summer, and to reduce energy consumption for cooling and heating.

DESCRIPTION OF SYMBOLS 1 Wooden house 1A Living space 2 Base part 3 Floor part 4 Exterior wall part 5 Partition wall part 6 Ceiling part 7 Roof part 21 Base 30 Floor filling insulation part 31 Floor material 32 Floor filling insulation material 33 Floor bundle 34 Large pulling 35 Floor finishing material 40 outer wall heat insulating part 42 heat insulating material 42a, 42b heat insulating receiving material 43 heat shielding sheet 44 exterior material 45 outer wall ventilation layer 46 pillar 47 horizontal member 47a lower end 47b, 47c side surface 48 wall material 60 ceiling filling heat insulating part 61 ceiling material (ceiling base) Material)
62 ceiling filling insulation material 64 ceiling joists 65 airtight sheet 71 hut back 72 rafter 73 heat shielding sheet 74 roofing material 75 roof side ventilation layer 76 hut back side ventilation layer

Claims (6)

In the ceiling part of the wooden framed house, a ceiling-filled heat-insulating section with a configuration in which ceiling-filled heat-insulating material made of fiber-based heat insulating material is spread along the back surface of the ceiling material ,
In the outer wall portion of the wooden framed house, the horizontal members as structural members located at the upper end of the outer wall portion and the upper end of the indoor partition wall portion have their lower ends lower than the lower end of the ceiling material. It is arranged so as to be located, the ceiling material is stretched so that its fore edge abuts the side surface of the horizontal member,
A joint portion between the side surface of the horizontal member and the fore edge of the ceiling material is a portion that functions as an airflow stop that blocks the flow of air that rises behind the hut,
The structure of the horizontal member is a thermal insulation structure of a wooden framed house which is set according to a thickness dimension of the fibrous heat insulating material constituting the ceiling filling heat insulating portion . In the outer wall portion , a wall heat insulating portion having a configuration in which a liner heat insulating material made of a plastic-based heat insulating material is stuck along an outer surface of a wall frame constituting the outer wall portion,
In the floor portion of the wooden framed house, a floor-filled heat-insulating section having a configuration in which a floor-filled heat-insulating material made of a plastic-based heat insulating material is spread along the back surface of the floor material.
Thermal barrier insulating structure of Wooden construction method house according to claim 1 which comprises a.   3. The wooden framed house according to claim 1, wherein the ceiling-filled heat-insulating section includes an air-tight sheet spread between the ceiling material and the ceiling-filled heat-insulating material along a back surface of the ceiling material. 4. Heat insulation structure. In the roof part of the wooden frame construction method, the roof part is provided with a heat shielding material attached so as to be parallel to the roof material along the rafters,
Between the roof material and the heat shield material, natural ventilation is formed from under the eaves of the roof portion, passing between the roof material and the heat shield material, and passing outside from the ridge side of the roof portion. Roof side ventilation layer that is
The space between the heat shield and the ceiling-filled heat-insulating portion passes from the eaves side through the space behind the cabin surrounded by the heat-shielding material and the ceiling-filled heat-insulating portion, and naturally exits from the ridge side to the outside. The thermal insulation structure of a wooden framed house according to claim 1, 2 or 3, wherein the ventilation layer is a ventilation layer formed in the back of the hut. In the outer wall portion, a wall outer heat insulating portion having a configuration in which an outer heat insulating material made of a plastic-based heat insulating material is stuck along an outer surface of a wall frame forming the outer wall portion,
The wall-lined heat insulating portion includes a laminated heat-insulating material stacked on an outer surface of the lined heat-insulating material,
Between the exterior material of the outer wall portion and the laminated heat shielding material, from the gap on the lower end side of the outer wall portion, passes between the exterior material and the laminated thermal insulation material, and is located on the upper end side of the outer wall portion. The thermal insulation structure of a wooden framed house according to any one of claims 1 to 4, wherein the outer wall ventilation layer is formed with a natural ventilation formed through the gap to the outside. In the floor portion of the wooden frame construction method, a floor-filled heat-insulating portion having a configuration in which floor-filled heat-insulating material made of plastic-based heat-insulating material is spread along the back surface of the floor material,
The floor portion includes a base and a large pullout arranged such that an upper end is located on the same plane, and a floor material spread along the upper end of the base and the large pullout,
The joint between the base and the upper end of the bar and the floor material is a portion that functions as an airflow stop that blocks the flow of air rising from the underfloor space,
The structure of the said base and the said enlargement is set according to the thickness dimension of the said floor filling insulation material which comprises the said floor filling insulation part, The Claim 1 any one of Claims 1 thru | or 5 characterized by the above-mentioned. Heat insulation structure of wooden framed house.